Health
Studies suggest that decision-making confidence depends on the activity of nerve cells
Researchers were actually on the path of a completely different evaluation mechanism. This study was conducted by researchers at the University of Bonn and published in the journal Current Biology.
Every day, humans have to make decisions. Researchers at the University of Bonn Hospital have identified nerve cells in the brain. Its activities show confidence in decision making. A total of 12 men and women participated in the experiment.
“I showed you pictures of two different snacks, such as a chocolate bar and a bag of chips, and then I was asked to use a slider to show which one I wanted to eat,” said Professor Florian Mormann. I will. Epilepsy department.
The more you move the slider from the center position towards the left or right photo, the more confident you will be in your decision.
Participants had to determine a total of 190 different snack pairs in this way. At the same time, scientists recorded the activity of 830 neurons each in the so-called temporal lobe.
“We have found that the frequencies of the electrical pulses of some neurons, in other words their’ignition rates’, change as the reliability of the decision increases,” said Mormann’s colleague Alexander Unruh-Pinheiro. I will.
“For example, the more often we fired, the more confident we were in the decisions of each tester,” Pinheiro added.
This is the first time that such a correlation has been identified between activity and decision credibility. Affected neurons are located in areas of the brain that play a role in memory processes.
“It is possible to save not only the decisions we made, but how confident we were in them. Perhaps such a learning process will save us from wrong decisions in the future.” Mohmann said.
For ethical reasons, it is usually forbidden to study the state of individual neurons in living humans. However, study participants suffered from severe epilepsy.
In this form of illness, characteristic seizures always begin in the same area of the brain. Therefore, one possible treatment is to surgically remove the focus of this epilepsy.
Epileptology clinic doctors implant several electrodes in the patient to pinpoint the exact location of the defect. These are distributed throughout the area that may be affected. At the same time, they also allow insight into the function of individual nerve cells in the brain.
Researchers at the University of Bonn were initially looking for a completely different phenomenon. When we make a decision, we assign a subjective value to each option.
“There is evidence that this subjective value is also reflected in the activity of individual neurons. Instead, the fact that we encountered this relationship between fire behavior and decision-making credibility is surprising even to us. Was, “Morman said.
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